Dicarbamates and process of making the same



Patented Nov. 18, 1947 2.431.140 DICARBAMATES AND moorss or MAKING run sam:

Maurice Arthur Thor-old chester, England, assl cal Industries Limite Britain No Drawing.

Rogers, 'Blackley, Manxnor to Imperial Chemid, a corporation of Great Application April 23, 1940, Serial No. 331,189, which is a division of application Serial No. 288,059, Aulust 2, this application August 609,480. In Great Britain 1939. Divided and 4. 1945, Serial No. August 2, 1938 7 Claims. (Cl. 260-4045) This application is a division of my copending application Serial No. 331,189. which in turn is a division of my application Serial No. 288,059, filed August 2, 1939.

(The above application have matured respec-- tively into U. S. Patents Nos. 2,386,142 and 2,386,- 141, both dated November 2, 1945.)

The invention in said parent application Serial No. 331,189 relates to-the manufacture of new quaternary ammonium compounds which are useful in treating textile materials, especially for the purpose of conferring water-repellent properties thereon.

According to that invention new quaternary ammonium salts are prepared by causing a halogenomethyl compound of the formula 12-0-0 I Q'CHzX wherein R is an aliphatic radical of at least '7 carbon atoms, X is a halogen and A is a divalent organic radical, to react with an aliphatic or heterocyclic tertiary amine.

My instant application deals with the preparation of the initial materials themselves.

As will be seen from the above formula, the halogenomethyl compounds which are used as starting materials are derivatives of the fatty alcohols ROH. They are, according to this invcntion, conveniently made by interaction of two molecular proportions of the chloroformic ester of the alcohol ROH with one molecular proportion of a diamine NH2-A-NH2, whereby a dicarbamate of formula is obtained, followed by treatment of the said (11- carbamate with formaldehyde (or a polymer thereof)v and a hydrogen halide or a substance behaving as such under the conditions of the reaction (e. g. phosgene), or with a product of the interaction of formaldehyde and a hydrogen halide, namely a dihalogeno-dimethyl ether.

As suitable fatty alcohols for making such halogenomethyl compounds there may be mentioned, for example, octyl, decyl, dodecyl, myristyl, cetyl, octadecenyl, octadecyl and ceryl alcohols; ormixtures of these and similar alcohols obtained by reduction of the acids of natural fats and oils, e. g., coconut oil, palm kernel oil or wool fat, alcohols obtainable by reduction of the esters of montanic acid; or alcohols obtainable by hydrolysis of the mixed sulphuric esters which are formed by sulphonation of polymerized low- CH CH: cameo-c 0160110 2 er oleflnes; or again alcohols which are simultaneously esters as, for example, p-hydroxyethyl stearate.

Thus, as suitable halogenomethyi compounds obtainable according to the process of this invention there may be mentioned, for example,

the di-(chloromethyl) -dicarbamates having formulae respectively HrCl (chloromethyl) o M M g:

the

C O-O-CnHar 31120] and -CO-O-C aH:1 (JHzCl H201 and also the corresponding di-(bromomethyD- dicarbamates and the corresponding di-dodecyl,

-cetyl, and di-montanyl di-(chloromethyD- and di-(bromomethyl)-dicarbamates. All the above di-(halogenomethyl) dicarbamates and their analogues may be made by the general method hereindescribed and claimed.

As suitable aliphatic or heterocyclic tertiary amines to be combined with the di-(halogenomethyl -dicarbamates to produce textile assistants therefrom, there may be mentioned, for example, trimethylamine, triethylamine, N:N'-tetramethylethylenediamine, dimethylcyclohexyl- The starting out materiel for this example is made as follows:

35 parts (i. e. /20 mol) of di-octadecyl p-phem ylene-dicarbamate of the formula (M. P. 146 0. made by condensing two molecular proportions of octadecyl chloroformate with one molecular proportion of p-phenylenediamine) and 6 parts of paraformaldehyde (i. e. In mol) are mixed with 500 parts of benzene. The mixture is stirred and heated. The temperature is kept at 60 C. while dry hydrogen chloride is passed in. As the reaction proceeds water separates out and the liquid becomes turbid. Eventually the liquid becomes clear again and the water separates from it and forms a separate layer. The lower aqueous layer is then run The benzene is distilled off from the upper layer, preferably under sub-atmospheric pressure. The residue left in the still is di-octadecyl N:N'- di-(chloromethyl) p phenylenedicarbamate of the formula:

It is an oil, which on standing at room temperature, or on cooling to below room temperature, solidifies to a white waxy solid which fumes slightly in the air, and which is soluble in the cold in benzene, acetone, ether, ethyl acetate and chloroform.

If the above dichloromethyl compound is mixed in liquid form with parts (i. e. /8 mol) of pyridine, there is evolution of heat, and the mixture rapidly sets solid. The solid is di-octadecyl NzN' diichloropyridinium methyl) p phenylenedicarbamate and is useful as a water-repellency agent.

In a similar manner,-starting in each case with 1 molecular proportion of the corresponding dicarbamic acid dialkyl ester and 2 molecular proportions of formaldehyde and treating the mixture in benzene with hydrogen chloride, there may be made the following di-(chloromethyD- dicarbamateis, namely, di-octadecyl N:N'-di- (chloromethyl) m phenylenedicarbamate, dioctadecyl NzN' di (chloromethyl) p phen ylenedicarbamate, di-octadecyl N:N'-di-chloromethyl) -,6 methyl 1:3 phenylenedicarbamate, di-octadecyl NzN' di (chloromethyl) 2 chloro 1:4 phenylenedicarbamate, di-dodecyl N:N' di (chloromethyl) p phenylenedicarbamate, di-octadecyl N:N'-di-(chloromethyl)- ethylenedicarbamate, di octadecyl N:N'- di (chloromethyl) hexamethylenedicarbamate, and di-octadecyl N:N'-di-(chloromethyl) -methylenedicarbamate.

Example 2 35 parts of di-octadecyl m-phenylenedicarbamate (M. P. 96 0., made by condensing two molecular proportions of octadecyl chloroformate with one molecular proportion of m-phenylenediamine) are converted into the dichloromethyl compound by the method described, in respect of the p-isomer, in Example 1.

The di-octadecyl N:N'-di-(chloromethyl) -mphenylenedicarbamate so obtained if dissolved in 150 parts of benzene, and treated with triethylamine, gives a bis-quaternary compound useful as a water repellent.

If in this process there are used, instead of the 35 parts of di-octadecyl m-phenylenedicarbamate. 33 parts of di-octadecyl ethylenedicarbamate, there is similarly obtained di-octadecyl N :N-di- (chloromethyl) -ethylenedicarbamate.

I claim as my invention:

1. As new intermediates for the manufacture of .textile assistants, compounds of the general formula a-o-c 0-N-CH -X a-o-oo-dr-cm-x wherein R is an aliphatic radical of at least 7 carbon atoms, X is halogen and A is a divalent hydrocarbon radical.

2. Process for producing organic intermediates which comprises reacting with agents yielding formaldehyde and a hydrogen halide upon a dicarbamic acid ester of th formula n-o-co-x'm wherein R is an aliphatic radical of at least 7 carbon atoms, while A is a divalent hydrocarbon radical. V-

3. As new intermediates for the manufacture of textile assistants, compounds of the general formula ao-c O -I IH wherein R is an aliphatic radical of at least '1 carbon atoms, while A is a divalent hydrocarbon radical.

4. Process for producing organic intermediates which comprises condensing one molecule of an organic diamine selected from the group consisting of aliphatic and aromatic diamines with two molecules of a halogen-formic-acid ester of the formula O-'-X, wherein R is an allphatic radical of at least '1 carbon atoms, while X stands for halogen, to form the corresponding diamide.

5. A process for producing organic compounds useful as intermediates for water-repellency agents, which comprises condensing two moles of a halogen-formic acid ester of an aliphatic alcohol with one mole of an organic diamine selected from the group consisting of aliphatic and aromatic diamines to give a diamide compound of the general formula wherein R is an aliphatic radical of at least I carbon atoms, while A is a divalent organic radical corresponding to the organic diamine selected then reacting upon said diam'ide with agents yielding formaldehyde and a hydrogen halide, to

produce di-(halogen-methyl) compound of the 5 general formula a-o-c 0-N--CH:--X

i zz-o-co-fiz-cm-x wherein R and A-have the same significance as above, while X stands for halogen.

6; Di octadecyl NzNf di(chloromethyl) p-phenylene-dicarbamate, the same being a waxy solid which'tumes slightly in air and which 15 is soluble in benzene, acetone, ether, ethyl acetate and chloroform.

7. Di octailecyl p phenylene dicarbam ate.

MAURICE THOROLD ROGERS.

' REFERENCES CITED The following references are of record in the file of this patent: I

UNITED sTATEs PATENTS 

